Shock absorber



O. F. BL YBURG.

SHOCK ABSORBER.

APPLICATION FILED FEB-16. I92I.

Patented July 25, 1922.

7206712 07 (Zea-7&1

' the invention.

OGDEN F. IBLYIBURG, OF ST. JOSEPH, MICHIGAN.

SHOCK ABSORBER.

Specification of Letters latent.

Patented July 25, 1922.

Application filed February 16, 1921. Serial 110. 445,278.

T 0 all whom it may concern:

Beit known that I, OGDEN F. BLYBURG,

of St. Joseph, Berrien County, Michigan, have invented a certain new and useful Improvement in Shock Absorbers, of which the followingis a specification.

This invention relates to shock absorbers in general, but more particularly to those having a dash pot action to cushion the load weight, or the impact of the shock, in conjunction with one or more springs.

Generally stated, the object of the inven tion is to provide an improved and novel construction whereby a dash pot, or several of them, may be advantageously combined with sprin means to cushion the shocks on an automo ile, or on a railway car, or in other places, as will hereinafter more fully appear.

To these and other useful ends the invention consists in matters hereinafter set forth Y and claimed, and shown in the accompanying drawings, in which:

igure 1 is a longltudinal section of a shock absorber embodying the principles of Figure 2 is a vertical transverse section on line 2-2 in Figure 1.

As thus illustrated, the invention comprises a housing 1 of metal plates secured together in the manner .shown to form a box of rectangular form. The cylinders 2 are secured in said housing, to the base thereof, as shown, and provided at the base thereof with ports or passages 3 to admit oil from the housing, and to permit the return of thevoil to the housing when the plungers 4 move downward in said cylinders 2, which latter with their plungers form dash pots. Said plungers have stems 5 to the upper ends of which a plate 6 is secured. A helical or coil spring 7 is coiled around each cylinder 2 to rest on the base thereof, and to bear against the under side of said plate 6, whereby downward movement of said bar not only drives the oil out of said cylinders 2, but also compresses said springs, which latter are immersed in the oil.- Rods 8 are attached to the plate 6 and work up and down in stuffing boxes 9 which seal the top of the housing. Springs 10 are interposed between the plate 6 and the bottom of the top wall of the housing, to cushion the upward movement, of-the plungers and other movable parts. Plugs 11 and 12 are provided in the housing for the admission and discharge,of the oil when necessary. The walls of the housing are all removably held together by bolts 13 or any other means.

The dash pot and housing may be used, of "course, without the springs, in any suitable or desired manner. When the load weight on the rods 8 moves the plungers downward, then the oil is driven out of the cylinders 2 and into the housing. Sufficient oil is maintained in the structure to nearlyfill the housing when the plungers are down. 7 I

When the load wei ht rises, because of the upward pressure 0 the springs 7, or any other provision, the oil is sucked back into the cylinders. As everything is enclosed, and immersed in the oil, there is less dan er of rusting or deterioration or other simi ar trouble. The device as thusconstructed can obviously be used on automobiles, or motor trucks, or in other places, and is sealed against the admission of dirt or dust, and against leakage of the oil. Any number of dash pots can be used, of course, without departing from the spirit of the invention,

From the foregoing it will be seen that the cylinders 2 forming the dash pot-s serveto keep the springs 7 in place, and form guides therefor, so that said springs do not rub against each other or against the housing, there being clearance all around the springs for this purpose.

What I 013111138 my lnvention is: 1. A shock absorber comprising a ger, a chamber in which said plunger is arranged to reciprocate, forming a dash 0t, and spring means held in place by the ash pot and adapted to yieldingly hold said plunger in normal position.' 2. A structure as specified inclaim 1, in

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combination with a housing for enclosing the sprin means and adapted to contain a liquid or said dash pot,-with said dash with a passage connecting said chamber with said housing), so that the liquid flows back and forth etween the housing and 'pot forming a guide for said spring, and

the chamber, the spring means being im- I mersed in the liqui p p 3. A structure as specified in claim 1, in combination with a housing for enclosing the spring means andholding a quantity of liquid for said dash pot, with a passage connectin the'chamber with the housing, so that the liquid flows back and forth between the housing and the chamber, a rod for said plunger, and a stufling box in which said rod slides, and whereby the housing is sealed.

4. In a shock absorber, a housing to contain a liquid, a cylinder in said housing, a plunger in said cylinder, with a passage connecting the cylinder with the housing, so that the liquid flows back and forth between the housin and the chamber, a coil spring arranged or compression on the exterior surface of said cylinder, means connected to said plunger to bear upon said spring, so that the spring is compressed when the plunger expels the liquid from said chamher, with clearance all around to prevent the spring from rubbing on the housing, a stuffing box on the housing, and a rod connected to said plunger to slide in said stufiing box.

5. A structure as specified in claim 4, and a smaller spring on said rod to limit the return movement of the lunger.

. 6. A structure as speci ed in claim 4, said spring being immersed in the liquid in said housing.

7. A structure as specified in claim 1, said spring being coiled around said dash pot to slide up and down thereon.

8. In a shock absorber, a cylinder and plunger forming a dash pot, a spring coiled around said cylinder, so that the dash pot is enclosed by and forms a guide for said spring, and means rigid with said plunger masses to compress said spring when the plunger moves into the cylinder.

9. A structure as specified in claim 8 in combination with one or more similar cylinders and plungers each forming a dash pot with a spring thereon, the springs being spaced apart to prevent them from interfering with each other, the housing enclosing said. dash pots and springs, with clearance all around to prevent the springs from rub-- hing on the housing, and-a liquid in said housing, the cylinder of each dash pot having a passage for the liquid.

10. A structure as specified in claim 5, and a housing spaced from said spring and adapted to contain a liquid, said cylinder havin a passage for said liquid.

11. n a shock absorber, a plurality of cylinders, a plunger for each cylinder, coil springs enclosing said cylinders, so that each cylinder forms a guide for its allotted spring, a bar connecting said plungers and bearing upon said springs and means for communicating pressure to said bar, said springs being spaced apart to prevent them from interfering with each other.

12. A structure as specified in claim 11, and a housing for enclosing said springs and other elements, adapted to contain liquid, with a liquid inlet and outlet for each cylinder, and with clearance all around to prevent said springs from rubbing on the housing.

OGDEN F. BLYBURG 

